

Another thing they may have in mind is ATX PSUs. The pinouts on those for the same physical plug vary not only by maker and model but sometimes even by year. So if you get an aftermarket ATX-to-SATA cable that fits just fine in the SATA plug on your ATX PSU, it may put 12v on the 5v and fry your drives or mobo when you plug it in even if it’s from the same brand.
Don’t ask me why there is a voltmeter on my desk.

Amazon has their own Linux dist that is relatively popular among their customers
https://aws.amazon.com/amazon-linux-2/
As for your question, consider thus: I think many users here have the resources to make their own personal Linux distributions without drawing from an existing base distro. Yet very few do. Why do you think that is? There’s a lot of overlap in the answers.